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Revealing low-frequency multipass sharpening

From: Photoshop CS3 Sharpening Images

Video: Revealing low-frequency multipass sharpening

A few exercises ago, we soft proofed the various sharpening phases when applied to a high frequency landscape image. This time we are going to soft proof the various sharpening phases as they apply to a low frequency portrait image. Now before, the difference between the various sharpening phases was rather subtle, this time it is not. At the end of the pervious exercise, you may recall I had flattened the images and downsampled it so that we could do a soft proof of the sharpening effect. Obviously, I would want to go ahead and press Control+Alt+Z and Control+Alt+Z, a couple of times in row.

Revealing low-frequency multipass sharpening

A few exercises ago, we soft proofed the various sharpening phases when applied to a high frequency landscape image. This time we are going to soft proof the various sharpening phases as they apply to a low frequency portrait image. Now before, the difference between the various sharpening phases was rather subtle, this time it is not. At the end of the pervious exercise, you may recall I had flattened the images and downsampled it so that we could do a soft proof of the sharpening effect. Obviously, I would want to go ahead and press Control+Alt+Z and Control+Alt+Z, a couple of times in row.

that's Command+Option+Z and Command+Option+Z a couple of times on the Mac in order to reinstate the full resolution layered version of this sharpened for output image. Alright, now lets take a look at another image right here. This one is called Comparison portrait.PSD and it contains 117 pixels per inch versions of each of the most essential phases here in the development of a sharpened image. Right Now we are looking at the layer called no sharpening at all.

I didnt apply any sharpening; this is the original image from photographer Eva Serrabasa. I believe the image had been sharpened for source, to the tune of 25%, just to compensate for the de-mosaicing process, but in so far as I could tell, that was all of the sharpening that had been applied. If we were to just go ahead and print that image after downsampling it at 300 pixels per inch, if would end up looking more or less like this, which is to say fairly soft. Its a beautiful image, but it lacks luster. Lets say, it's a little bit lackluster - that is.

Alright, this is what the image would like if we applied everything but the output sharpening. So that is to say, we went ahead and sharpened for detail and we sharpened for effect. So it makes a little bit of difference. This is what the image looks like before and this is what it looked like after. I mean actually it is a fairly significant amount of difference, especially, if I zoom this in to 200%, you should be able to make out in a video. This is the image without any sharpening, this is with the effect and detail sharpening. This is the image, if I had just output sharpened it.

If I hadn't made any detail or effect adjustments whatsoever, I had just output sharpened the image. It would look like this, which is to say, lets sharp. So when we are working with the high frequency image that was a more sharp effect than the sharpening for source and sharpening effect combined together. This time it is a less sharp effect and bear in mind, I want to make this perfectly clear, this is the extent to which most people sharpen images. They just apply one pass of sharpening, this is old school. You will apply one pass of sharpening for output and nothing more and you end up getting something that really does not look all that great, in the case of this image.

This right there though, this top one is the multi-pass sharpening effect, everything combined together. And look how much better that looks. A much, much more aggressive and more becoming effect in my opinion. Lets go ahead and zoom out and take in all of the layers to the 100% zoom level. So we will go back down to the bottom, I am Alt+clicking on the eyeball, so we can see this is no sharpening at all. This is the result of the effect and detail sharpening. This is the result of the output sharpening without either the detail or effect sharpening, and this is the result of all three passes of sharpening combined potentially along with a little bit of sharpening for source as well.

So you can see how much of a difference multi-pass sharpening can make to your images.

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This video is part of

Image for Photoshop CS3 Sharpening Images
Photoshop CS3 Sharpening Images

115 video lessons · 17012 viewers

Deke McClelland
Author

 
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  1. 50m 30s
    1. Why every image needs sharpening
      2m 38s
    2. Understanding the effects of sharpening
      5m 26s
    3. Understanding the mechanics of sharpening
      4m 19s
    4. Understanding sharpening and gradual transitions
      3m 21s
    5. Understanding sharpening and noise reduction
      4m 0s
    6. Understanding amount and radius
      7m 50s
    7. Measuring your screen resolution
      6m 19s
    8. Using reliable zoom ratios
      5m 30s
    9. Calculating the actual print size
      4m 54s
    10. Gauging the ideal sharpening settings
      6m 13s
  2. 59m 31s
    1. Everyone knows you sharpen last (and everyone is wrong)
      1m 8s
    2. Understanding the conventional sharpening workflow
      5m 4s
    3. Flattening and saving to TIFF
      6m 39s
    4. Downsampling (and why you shouldn't upsample)
      6m 8s
    5. Understanding last-step sharpening
      6m 44s
    6. Recognizing problems with the conventional workflow
      9m 38s
    7. Erasing sharpening with the history brush
      4m 30s
    8. Using alternative sharpening workflows
      2m 37s
    9. Sharpening a scanned photograph shot on film
      2m 45s
    10. Sharpening a digital photograph
      3m 6s
    11. Sharpening specific details
      3m 43s
    12. Finding broad workflow conclusions
      2m 49s
    13. Learning that technique trumps timing
      4m 40s
  3. 1h 27m
    1. Comparing and contrasting neighboring pixels
      1m 6s
    2. Using the Gaussian Blur filter
      4m 25s
    3. Using Gaussian luminance distribution
      4m 47s
    4. Using the Unsharp Mask filter
      4m 54s
    5. Understanding the history of Unsharp Mask
      3m 51s
    6. Building your own USM with Gaussian Blur
      7m 35s
    7. Using the Smart Sharpen filter
      7m 35s
    8. Compensating for camera shake
      8m 50s
    9. Building your own Smart Sharpen with Lens Blur
      6m 59s
    10. Using directional sharpening with Emboss
      9m 13s
    11. Using Smart Sharpen extras
      8m 56s
    12. Using Convolution Kernels for more accuracy
      7m 8s
    13. Using the High Pass filter
      7m 32s
    14. Using Luminance Sharpening
      5m 5s
  4. 2h 14m
    1. Smoothing filters, smart objects, and masks
      1m 25s
    2. Using the Median filter and Dust and Scratches
      7m 7s
    3. Using Smart Blur and Surface Blur
      6m 12s
    4. Using the Despeckle filter
      8m 17s
    5. Softening flesh tones selectively
      10m 15s
    6. Using the Reduce Noise filter
      7m 27s
    7. Combining smoothing and sharpening
      8m 24s
    8. Making an image into a smart object
      9m 24s
    9. Applying editable smart filters
      6m 8s
    10. Combining two smart filters
      8m 5s
    11. Assigning a filter mask
      5m 59s
    12. Nesting one smart object inside another
      10m 32s
    13. Employing a static High Pass layer
      8m 59s
    14. Matching static pixel-level edits
      4m 37s
    15. Avoiding clipping with luminance blending
      9m 7s
    16. Sharpening and smoothing
      6m 36s
    17. Making an edge mask
      8m 14s
    18. Making a non-edge mask
      7m 17s
  5. 1h 33m
    1. Sharpening with Adobe Camera Raw
      1m 29s
    2. Introducing Camera Raw (4.1 or later)
      8m 13s
    3. Understanding why to sharpen for source
      5m 14s
    4. Using Camera Raw’s sharpening control
      5m 52s
    5. Previewing limitations and tricks
      6m 45s
    6. Why downsampling doesn’t work
      3m 12s
    7. Reducing chromatic aberration
      7m 30s
    8. Using the Defringe option
      3m 32s
    9. Understanding high frequency, low radius
      5m 21s
    10. Raising the Detail value
      3m 6s
    11. Using on-the-fly edge masking
      5m 41s
    12. Sharpening a low-frequency portrait
      6m 36s
    13. Eliminating color noise
      4m 47s
    14. Reducing luminance noise
      4m 42s
    15. Correcting “false sharpening”
      7m 15s
    16. Reducing shadow noise
      5m 22s
    17. Approximating ACR sharpening in Photoshop
      8m 35s
  6. 59m 8s
    1. Gauging and exploiting luminance frequency
      1m 27s
    2. Using low-frequency source sharpening
      5m 53s
    3. Using High Pass for portraits
      4m 19s
    4. Actioning a low-frequency edge mask
      7m 42s
    5. Modifying the source sharpening
      5m 21s
    6. Using high-frequency source sharpening
      5m 26s
    7. Using Smart Sharpen for cityscapes
      3m 2s
    8. Actioning a high-frequency edge mask
      5m 4s
    9. Downplaying color artifacts and clipping
      4m 4s
    10. Sharpening a medium-frequency image
      5m 24s
    11. Sharpening a layered composition
      7m 16s
    12. Sharpening for multiple frequencies
      4m 10s
  7. 1h 8m
    1. Who needs dull when you have sharp?
      56s
    2. Focusing in on a person’s eyes
      4m 22s
    3. Blurring the area outside the eyes
      4m 22s
    4. Sharpening eyes and other details
      5m 38s
    5. Darkening the lashes and eyebrows
      7m 13s
    6. Sharpening dark-haired people
      5m 2s
    7. Edge mask and emphasize
      3m 39s
    8. Nesting a Smart Sharpen effect
      4m 48s
    9. Density mask sharpening
      5m 35s
    10. Adding depth of field
      4m 39s
    11. Sharpening a background
      4m 23s
    12. Masking background from foreground
      8m 51s
    13. Eliminating halos around a person
      5m 38s
    14. Deepening and warming a background
      3m 28s
  8. 1h 18m
    1. Reverting back to convention
      1m 37s
    2. Understanding the use-neutral composition
      4m 15s
    3. Restoring much-needed antialiasing
      4m 2s
    4. Reducing noise in a high-frequency image
      7m 24s
    5. Making a third-level smart object
      3m 55s
    6. Preparing an image for print
      5m 18s
    7. Using ideal settings for commercial reproduction
      5m 37s
    8. Calculating very large-format settings
      5m 11s
    9. Using ideal settings for inkjet output
      4m 26s
    10. Sharpening for commercial reproduction
      5m 45s
    11. Sharpening for inkjet output
      4m 58s
    12. Revealing high-frequency multipass sharpening
      5m 21s
    13. Using Gaussian Blur to sharpen hair
      5m 41s
    14. Flatten, Save As, Resample, and Sharpen
      5m 9s
    15. Revealing low-frequency multipass sharpening
      3m 30s
    16. Sharpening an image for web or screen
      6m 22s
  9. 1m 50s
    1. Goodbye
      1m 50s

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